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Anni [7]
3 years ago
13

A substance has a heat of fusion of 155 J/g. How many joules of energy are required to be removed in order to freeze a 10.0 g sa

mple?
Chemistry
1 answer:
vovangra [49]3 years ago
5 0

1550J

Explanation:

Given parameters:

Heat of fusion = 155J/g

Mass of sample = 10g

Unknown:

Quantity of heat removed to freeze the substance =?

Solution:

This is a phase change problem and we apply the formula for the specific heat of fusion to solve the problem:

                 Q = mL

   m is the mass of the substance

   L is the specific heat of fusion of the substance.

We then plug the parameters into the equation:

                Q = 155J/g  x 10g = 1550J

Learn more:

specific heat brainly.com/question/7210400

#learnwithBrainly

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<span> 52.0ml of 0.35M CH3COOH : 0.052 L(0.35M) = .0182 mol of CH3COOH. 
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3 years ago
4. A sample of gas has a pressure of 700 mmHg and 30.0°C. Ar what temperature would the pressure be 600 mmHg if the volume remai
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Answer:

T₂  = 259.84 K

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